
<template>
  <div class="type-nav">
    <div class="container">
      <div
        @mouseenter="enterShow"
        @mouseleave="leaveShow"
        style="display: flex"
      >
        <h2 class="all">全部商品分类</h2>
        <transition name="sort">
          <div class="sort" @click="goSearch" v-show="show">
              <div class="all-sort-list2">
                <div
                  class="item"
                  :class="{ active: currentIndex === index }"
                  v-for="(item, index) in categoryList"
                  :key="item.categoryId"
                  @mouseover="getIndex(index)"
                  @mouseout="removeIndex"
                >
                  <h3>
                    <a
                      :data-categoryName="item.categoryName"
                      :data-category1Id="item.categoryId"
                      >{{ item.categoryName }}</a
                    >
                  </h3>
                  <div
                    class="item-list clearfix"
                    v-show="currentIndex === index"
                  >
                    <div
                      class="subitem"
                      v-for="(item2, index2) in item.categoryChild"
                      :key="item2.categoryId"
                    >
                      <dl class="fore">
                        <dt>
                          <a
                            :data-categoryName="item2.categoryName"
                            :data-category2Id="item2.categoryId"
                            >{{ item2.categoryName }}</a
                          >
                        </dt>
                        <dd>
                          <em
                            v-for="(item3, index3) in item2.categoryChild"
                            :key="item3.categoryId"
                          >
                            <a
                              :data-categoryName="item3.categoryName"
                              :data-category3Id="item3.categoryId"
                              >{{ item3.categoryName }}</a
                            >
                          </em>
                        </dd>
                      </dl>
                    </div>
                  </div>
                </div>
              </div>
          </div>
        </transition>
      </div>
      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
    </div>
  </div>
</template>

<script>
import { mapState } from "vuex";
// import debounce from 'lodash/debounce'
export default {
  name: "TypeNav",
  data() {
    return {
      currentIndex: -1,
      show: true,
    };
  },
  computed: {
    ...mapState({
      categoryList: (state) => state.home.categoryList,
    }),
  },
  mounted() {
    
    if (this.$route.path != "/home") {
      this.show = false;
    }
  },
  methods: {

    //动态修改导航颜色
    getIndex(index) {
      //没必要防抖节流
      this.currentIndex = index;
      //解决文字显示过快,动画问太慢
      document.querySelector('.sort').style.overflow = 'visible';
    },
    removeIndex() {
      this.currentIndex = -1;
      document.querySelector('.sort').style.overflow = 'hidden';
    },
    enterShow() {
      //鼠标进入
      this.show = true;
    },
    leaveShow() {
      //鼠标离开
      if (this.$route.path != "/home") {
        this.show = false;
      }
    },
    goSearch(event) {
      let { categoryname, category1id, category2id, category3id } = event.target.dataset;
      let query = {};
      if (categoryname) {
        query.categoryName = categoryname;
        //如果点击的是a标签
        if (category1id) {
          query.category1Id = category1id;
        } else if (category2id) {
          query.category2Id = category2id;
        } else {
          query.category3Id = category3id;
        }
       
      }
     
      this.$router.push({
        path: "/search",
        query,
      });
      
     
    },
  },
};
</script>

<style scoped lang="less">
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 510px;
      position: absolute;
      background: #fafafa;
      z-index: 999;
      overflow: hidden;
      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &.active {
            background: gray;
            h3 {
              a {
                color: white;
              }
            }
          }

        }
      }
    }
    //过渡动画开始状态(进入)
    .sort-enter {
      height: 0px;
    }
    //过渡动画结束状态(进入)
    .sort-enter-to {
      height: 461px;
    }
    //定义动画时间,速率
    .sort-enter-active {
      transition: all 0.3s linear;
    }
  }
}
</style>